Water-tube boiler.



No. 765,443. PATENTED JULY 19, 1904. v

0. L. SEABURY.

WATER TUBE BOILER. APPLIOATION FILED 001'. 9, 1902. NO MODEL.3811221154322 1-.

Nb. 765,443. PATENTED JULY 19, 1904. 0. L. SBABURY.

WATER TUBE'BOILER.

APPLIOATION FILED 00129, 1902. no MODEL. a SHEETS--SHEET z.

. Mai 54. H

7 No. 765,443. PATENTED JULY 19, 1904. Q G. L. SEABURY.

WATER TUBE BOILER.

APPLIOATION FILED 001'. 9. 1902. I

no 140mm.- I I 3 SHEETS-SHEET a.

UNITED STATES Patented July 19, 1904.

CHARLES L. SEABURY, OF NEW YORK, N. Y.

WATER-TUBE BOILER.

SPECIFICATION forming part of Letters Patent No. 765,443, dated July 19,1904:.

Application filed October 9, 1902.

To a w/wm it may concern.-

Be it known that I, CHARLES L. SEABURY, a citizen of the United States,and a resident of the city of New York, State of New York, have.invented certain new and useful Improvements in VVater-Tube Boilers, ofwhich the following is a full, clear, and exact description, referencebeing had to the accompanying drawings, forming part of thisspecification.

This invention relates to certain improvements in water-tubesteam-boilers, and particularly to that class wherein the water iscaused to circulate between upper and lower drums through the medium ofsmall tubes located between the samesuch, for instance, as the characterof boiler illiis'trated and described in my United States Letters PatentNos. 497,432 and 523,489.

The object of my present invention is to generally improve theconstruction of this class of water-tubeboilers by increasing thecapacity thereof and overcoming certain objections now existing both inthe construction and operation of the same and obtaining the very bestresults without increasing the amount of fuel used.

In boilers of the class to which this invention relates a very rapidcirculation of the water is effected, and the aim is to dispose andarrange the water-tubes in their relation to the furnace and fines insuch a manner that the water contained therein will absorb a maximumquantity of the heat developed in the combustion of the fuel. During thecourse of my experiments I have found that a most important feature ofthis class of boilers is that the disposition and arrangement of thewater-tubes shall be such that the products of combustion shall beguided and directed in, around, and about the said water-tubes in themost efficient manner, so that the greatest amount of absorption of heatby the water contained in said tubes shall be accomplished, at the sametime facilitating the passage of heat-currents in and about a maximumarea of tubing. In my prior inventions hereinbefore referred to this wasaccomplished to a certain extent; but my present invention em bodies aconstruction and arrangement for producing much more favorable resultson Serial No. 126,454. (No model.)

these general lines by reason of the arrangement and distribution of theparts in their relation to each other so that the greatest amount ofabsorbed heat is effected in the circulating columns of water, while atthe same time the currents of heat from the furnace are permitted totravel around the said series of tubes quite freely, thus allowing thatportion of the tubing in the line of passage of the heat-currents at adistance from the furnace proper an opportunity to absorb a goodproportion of the heat. In other words, a more even distribution of theheat is effected in my present invention throughout the series ofcolumns of water circulating in said tubing, while at the same time amaximum quantity of the heat from the products of combustion is utilizedwith the least possible waste, thereby bringing about a saving in theconsumption of fuel, and consequently cheapening the cost of operatingthe boiler.

In order to accomplish the results above described, I arrange one ormore series of watertubes immediately adjacent the combustionchamber ofthe furnace in such a manner as to be exposed to the flames directly ontwo or more sides of the furnace, the tubes of each series being in suchclose relation to each other as to practically form the furnace-wall andto direct the products of combustion toward one end or the other of thefurnace where the tubes are separated and staggered. Between the saidrows of closely-arranged tubing and the outer wall of the furnace,disposed for a considerable portion of their lengths substantiallyperpendicularly, are a number of series of similarly-disposed tubingsseparated from each other, preferably staggered relatively to eachother, so as to afford a free passage for the products of combustion andfor directing the currents of the same through the separated series oftubings in a direction lengthwise of the furnace to their ultimate exitor connection with the flue.

I am aware that numerous constructions have heretofore been madeembodying series of water-tubes in steam-boilers arranged so that theproducts of combustion from the furnace in their passage to theexhaust-fines may pass about the said. tubing. Therefore I do section.

tion taken about on the line 3 3 of Fig. 1.-

not desire to claim the same broadly, my invention in this respectresiding mainly in the improved construction and arrangement hereinafterparticularly set forth, and pointed out in the appended claims.

Referring to the accompanying drawings, in which similarreference-numerals are used to indicate like parts, Figure 1 is a frontelevation, partly in section, of a water-tube boiler constructed inaccordance with my invention. Fig. 2 is a plan view of the same, partlyin Fig. 3 is a vertical sectional eleva- Fig. 1 is a detail view incross-section of the upper drum.

In the construction shown in the drawings, 1 designates an outer shellor casing, which may be made of the desired shape or form for inclosingthe series of water-tubes. The front wall of the said casing is providedwith suitable doors, as 2, throughwhich access may be had to thefire-box or furnace 3. The side walls of the casing 1 are preferablylined with a layer of magnesia, located against the interior of theouter shell, and an inner lining of asbestos cardboard. At the front andrear of the combustion-chamber or furnace I provide on the inside of themagnesia lining a wall or backing composed of fire-brick, as illustratedin Figs. 2 and 3 of the drawings. The lower portion of the furnace isprovided with a suitable grate 1 and an ash-pit 5, located under thesaid grate, as shown.

In the upper central portion of the boilercasing I provide ahorizontally-disposed drum 6, having its forward end projecting slightlyoutside of the wall of the boiler-casing and its rear end extending intothe upper portion of the boiler-flue or stack-casing, as illustrated inFig. 3 of the drawings. In the lower portion of the boiler-casing aresupported the water-drums 7, disposed horizontally on each side of thecombustion-chamber at a point adjacent to the fire-boxes, as illustratedmost clearly in Fig. l of the drawings. The said water-drums areconnected by means of the pipes 8. (Illustrated by the dotted lines inFig. 1 and shown in section in Fig. 3 of the drawings.) At the rear endof the boiler I provide the water-leg 9, which is connected at its upperend to the rear portion of the main drum 6 and at its lower end to thecentrally-disposed water-drum 7 The lower portion of the water-leg 9 islocated outside of the boiler-casing, as shown in Fig. 3 of thedrawings, and the rear ends of the waterdrum 7 also project outside ofthe rear wall of the casing.

On each side of the, combustion-chamber 3 are located the water-tubes 10and 11, the tubes 11 being located on the outer side of said chamber andcommunicating at their lower ends with the outer water-drum 7 and attheir upper ends with the main drum 6. These tubes 11 run substantiallyparallel to products of combustion.

each other in a slanting direction toward the 'center of thecombustion-chamber and in about their centers are bent and extendupwardly in a slanting direction to the main drum 6, thus extendingalong one side and over the top of combustion-chamber 3 through theentire depth of said chamber. The inner series of tubes, as 12, are setclose together from a point within a short distance of the front end ofthe combustion-chamber, thus forming a solid wall on the side and top ofthe said combustion-chamber and forming a flue between the wall soformed and the outer casing of the boiler-frame. The tubes 11, which arelocated in the flue thus formed, are

. set apart or away from each other and staggered, as illustrated inFig. 2 of the drawings, thus providing a space around the said tubes forthe circulation of the heat and the The solid wall of tubes 12 is formedby bending the inner row of staggered tubes at their lower ends in suchmanner as to bring them in line with the second row of staggered tubes,this bend being shown in dotted lines in Fig. 1 of the drawings.

The tubes 10, which are located on the inside of the combustion-chamber3, communicate at their lower ends with the centrallydisposed water-tube7 and at their upper ends with the main drum 6. These tubes 10 runsubstantially parallel to each other and extend upwardly from the saiddrum 7 in aslanting direction toward the center of the combustion-chamber 3, where they are bent and extend upwardly in anoppositely-slanting direction, where they enter the main drum 6, asbefore described. The inner series of tubes 13 are located side by sidetouching each other, so as to form a solid wall from the rear end of thefurnace to a point within a short distance of the front end, asillustrated in Fig. 2 of the drawings, thus forming a separate chamberor flue between the said tubes 13 and the middle wall of theboiler-casing 1. The tubes 10, located in this flue, are arranged ashort distance away from each other and staggered in the same manner asthe tubes 11 on the other side of the combustion-chamber, so as to allowthe heat and other products of combustion to freely circulate around thesame. The solid wall of tubes, as 13, is formed by bending the inner rowat a point near their lower ends into line with the second row ofstaggered tubing in the same manner as described with reference to thetubes 12.

From the foregoing description it will be readily understood that thecombustion-chamber 3 has a side wall and roof composed of the tubes 12and an opposite side wall composed of the tubes 13, which, together withthe other suitable means.

arising from the fire-box must pass forward and through the said openportions and 16 into the fines formed between the walls 12 and 13 andthe sides of the boiler-casing and thence along through the said fluesthe entire depth of the furnace, circulating around the staggered pipes10 and 11 and passing into the main flue 17 to the smoke-stack 18. Itwill thus be readily seen that the entire amount of heat in thecombustion-chamber is utilized and guided from the forward part of thesaid chamber in and around the separated tubes, and from thence itpasses the entire length or depth of the said furnace, so that thegreatest amount of absorption of heat by the water shall be effected,the arrangement of the said tubing being such as to allow theheat-currents to circulate in and around the maximum area of thewater-tubes.

The main drum 6, which is centrally disposed in the upper portion of theboiler-casing and into which the upper ends of all of the water-tubesenter, is provided in its upper central portion with a steam-receiver19, which consists of a pipe extending longitudinally of said drum andsupported to the upper portion of the same by means of the straps 20 orby This pipe 19 has in its upper surface a series of perforations, as21, through which the steam passes after it has been generated to theengine or other apparatus to be operated. The water inlet pipe 22 entersthe drum 6 at its front end and passes longitudinally through the same,it being preferably located in the lower portion of said drum,- so as tobe immersed in the heated water contained therein, thus utilizing theheat contained in said water to heat the incoming water. Thiswater-inlet pipe 22 communicates with the water-leg 9 at the rear end ofthe boiler, and thus feeds the lower water-drum 7. From thence the waterpasses to the tubes located in the combustion-chambers. Thisconstruction prevents the cold supply-water from coming in directcontact with parts of the boiler which are under pressure and which,owing to the unequal expansion and contraction due to' considerableclifferences of temperature, would be caused to leak and possibly becomeunsafe and unreliable.

My improved boiler is preferably construct ed with twoindependentfire-boxes, and inde- The upper main drum 6 forms a partition betweenthe upper portion of the two chambers and is large enough to feed andreceive the steam from both sets of tubes.

- By the construction and arrangement of boiler herein described I amenabled to greatly economize in space and in the cost of construction,while at the same time the efliciency and capacity of my boiler is verymaterially increased. While I have shown and described my preferred formof construction, I do not wish to be limited to the exact detailsillustrated, but hold that various changes might be made in thearrangement and details of construction of the different parts withoutdeparting from the spirit and scope of my invention.

Having thus describedmy invention, what I claim, and desire to secure byLetters Patent, is

1. In a water-tube steam-boiler, the combination with the boiler-casing,an upper generating-drum supported within said casing, acombustion-chamber, water-drums located on each side of thecombustion-chamber adjacent to the fire-box, a series of water-tubesconnecting the upper drum with one of the lower drums on one side of thecombustionchamber, and a second series of water-tubes on the oppositeside of the combustion-chamber extending upwardly and across the top ofsaid chamber and connected with the upper drum at a point substantiallybelow the normal water-line, and with the other lower water-drum.

ter-tubes provided in said combustion-flue M a main water and steam drumlongitudinally disposed in the upper portion of the structure andmanifold drums longitudinally disposed in the lowerportion of thestructure, the said manifold drums being connected by pipe connectionsand said pipe connections being connected by water-leg with said maindrum, combustion-fines provided longitudinally of thecombustion-chambers having the walls adjacent to the combustion-chamberformed of a series of water-tubes in close contact, laterallyconsidered, the outer walls of the outermost fines being formed of thecasing of the structure, said tubes being bent substantially midway oftheir lengths, series of water-tubes provided in said combustion-finesconnected and shaped substantially similarly to the tubing forming theinner Walls of said chamber, said interiorly-disposed series of tubingbeing spaced and separated from each other substantially equidistantlyto allow the products of combustion to freely pass in and about thesame, each adjacent series being staggered relatively to the proximateseries, substantially as described.

In a water-tube steam-boiler, the combination of an inclosing casing,two independent combustion-chambers located therein, alongitudinally-disposed main drum located in the upper portion of theboiler-casing projecting into each of the independent chambers, a lowerwater-drum longitudinally disposed and forming a partition between thelower portion of the combustion-chambers, a series of watertubes locatedon the innersides of each combustion-chamber connecting the centralwaterdrum with the upper main drum, the said water-tubes extending in aslanting direction toward the center of each combustion-chamber and thenin an opposite slant to the bottom portion of the upper main drum, aWaterdrum located at the outer lower ends of each combustionchamber,aseries of water-tubes extending upwardly from said drum and thenobliquely across the tops of the combustionchambers and connected to theupper main drum substantially below the normal water' line, pipesconnecting the three lower drums and a water-leg connecting the samewith the upper main drum, substantially as described.

5. The combination with the boiler-casing, a longitudinally-dis posedmain drum centrally located in the upper portion of the boiler,longitudinally-disposed water-drums located on each side of the lowerportion of the combustion-chamber, series of tubes arranged on each sideof the combustion-chamber connect ing the lower drums with the upperdrum, the said tubes being connected to the said drums in staggered orZigzag lines, each series of tubes extending upwardly substantiallyparallel with the side walls of the boiler and then obliquely to connectwith the main drum below the normal water-line, the inner row of tubeseach side of the combustion-chamber arranged to stand in lateral contactwith each other to within a shortdistance from the front casing of theboiler thereby forming flues on each side and top of thecombustion-chamber opening at their front ends into saidcombustionchamber, through which the heated gases must pass to asmoke-flue, substantially as described.

6. In a water-tube steam-boiler an upper main drum locatedlongitudinally in the upper portion of the structure centrally of thesame above the combustion chambers, manifold drums providedlongitudinally in the said structure about on the level with thefire-grate of the combustion-chambers adjacent thereto, twocombustion-chambers, one of the lower drums being located between thetwo latter chambers and one on the outer side of each of saidcombustion-chambers, said lower drums being connected-by water-pipelocated outside of said combustion-chambers, and water-leg connectingthe main upper drum with said piping connection, series of water-tubingconnecting each of the lower drums with the up: per drum, the innerseries of said tubes being compactly arranged together for the greaterlength of the combustion-chamber, separated and open only at the frontend forming substantially the walls of said combustion-chambers, theseries of tubing forming the outer walls of each combustion-chamberrising up-- wardly and inclining slightly inwardly from the lower drumto a point about equal half the length of the said tubing and then bentat an angle inwardly and slightly upwardly to connect with the upperdrum substantially below the normal waterline, the series of tubingforming the inner walls of said combustion chambers extending from thecentral lower drum and curved or bent inwardly and upwardly toward thecenter of said combustion-chamber and then bent or curved in the upperportion thereof in the opposite direction and connecting at their upperends with the main drum adjacent its lowest point, and inner structuralwalls provided substantially centrally between the main upper drum andthe lower central drum thereby forming two longitudihally-disposedcentral fiues between said series of centrally-disposed tubing for theproducts of combustion to pass from the combustion-chamber to the'smoke-flue with which the said flues are connected, and like outer finesformed between the outer walls of the inclosing casing and the series ofcloselyunited tubing connecting the outer lower drums with the uppermain drum, and series of water-tubes provided in said combustionfluesconnected and shaped substantially similarly to the tubing forming saidwalls of the combustion chambers, said interiorly disposed series oftubing being separated from each other and staggered to allow theproducts of combustion to freely pass in and about the same in theirpassage to the smoke-flue, substantially as described.

In witness whereof I have hereunto set my hand this 6th day of October,1902.

CHARLES L. SEABURY. Witnesses:

FRANCIS R. DOOLEY, C. R. HARBAN.

